feat: add backend

apps/server/app.ts

@@ -0,0 +1,10 @@
+import Koa from 'koa';
+import { registerMiddlewares } from './middlewares/index.ts';
+
+const app = new Koa();
+
+registerMiddlewares(app);
+
+app.listen(3000, () => {
+  console.log('server started at http://localhost:3000');
+});